Small proportions of actively-smoking patrons and high PM2.5 levels in southern California tribal casinos: support for smoking bans or designated smoking areas

Table 3 Patron and active-smoker counts, and occupancy and active-smoker proportions for all areas by casino visit ^a

Casino	Visit 1				Visit 2
	Total Patrons	Smokers	% Active Smokers	% Occupancy	Total Patrons	Smokers	% Active Smokers	% Occupancy	Overall Mean (% Active Smokers)	Mean Difference between Visits (% Active Smokers; Visit 2 – Visit 1)
A	1133	78	6.88%	50.6%	1082	85	7.86%	48.3%	7.36%	0.97%
B	1234	71	5.75%	46.0%	1141	93	8.15%	42.6%	6.91%	2.40%
C	819	58	7.08%	39.6%	945	72	7.62%	45.7%	7.37%	0.54%
D	1126	78	6.93%	39.4%	1820	93	5.11%	63.7%	5.80%	−1.82%
E	1195	74	6.19%	45.0%	1318	97	7.36%	49.6%	6.80%	1.17%
F^b	2360	210	8.90%	54.0%	8576	159	1.85%	196.2%	3.37%	−7.04%
G	607	49	8.07%	44.8%	457	37	8.10%	33.7%	8.08%	0.02%
H	862	83	9.63%	38.4%	929	85	9.15%	41.4%	9.38%	−0.48%
I	1451	86	5.93%	44.0%	1309	72	5.50%	39.7%	5.72%	−0.43%
J	1006	61	6.06%	58.4%	1228	84	6.84%	71.3%	6.49%	0.78%
K	1107	69	6.23%	35.9%	1841	102	5.54%	59.8%	5.80%	−0.69%
Overall^b	12900	917	7.11%	--	12070	820	6.79%	--	6.96%	0.93% ^c

^aData shown are for the entire casino, i.e., for the total smoking and nonsmoking areas. All occupancy rates and active-smoker proportions areas are expressed as a percentage (% Occupancy;% Active Smokers). Occupancy is the number of total patrons divided by the theoretical capacity of all smoking areas. Smoker-activity as a function of occupancy for main smoking areas is presented in Figure 2. Occupancy for nonsmoking areas (slots + tables) relative to main smoking areas is presented in Figure 3.
^bDuring the second visit to Casino F, patron occupancy was substantially higher than the first visit, resulting in a decrease in active smoker count proportion. We considered this event to cause unlikely deviations and therefore excluded it from our overall analysis. It is, however, presented here in disaggregated format for reference. The overall row contains the row-wise sums for the Patrons and Smokers columns, and the overall percentages across all casinos for a given visit or across all visits. Data for the overall row excludes all the results from the second visit to Casino F (numbers in bold).
^cThe overall mean difference in the last column excludes the second visit to Casino F (number in bold), and considers only the magnitude of difference between visits, not the direction.

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